Yep, link fixed. ;)

What sort of hacks have you added? Do you recall any that would do any sort of character replacement? The reason I ask, is your error says this line:
Normally, it would not have the "<" and ">" in there. See this thread that shows a similar error and notice how it start the error out as:
I don't know if this is a php issue or a mysql issue or something you did to your site, but it is worth noting.

The last one i added was 'Track Guests'

Everything was working fine though, the mod too.

Also the &lt and other weird sign arent actually there and dont show when i edit my post, only show up when its posted, weird.

The site www.removedmysiteaddy.com does not open at all for me.

I guess that's because he removed his sites address ;-)